I am using highlight masks in DVD Architect Pro 6 for menu selections and they look fine when I preview the menus in DVD-A but after the DVD is burned the highlights appear to be off-centered a little bit on the actual DVD. I am including a screen shot of one of the menus as an example. Hopefully the issue can be seen. Does anyone have any ideas on how to fix this or if maybe I am doing something wrong?

Just a very wild thought - do you have shadow enabled on the text (I think it's automatically enabled when you create a new button)? I'm just wondering if that has any effect on the mask. You wouldn't be able to see the shadow as you are using a black background.